The Astrocade is very high on the "list of systems I wish I owned". I should probably start scouring ebay instead of hoping I accidentally bump into one somewhere. Like the Fairchild Channel F entry, this is based on the cartridge number: #2019 – Cosmic Raiders. It's not a bad game, an obvious Defender clone but passable nonetheless.
A couple homebrew cartridges were released after Cosmic Raiders, but it was the last official release.